Home / 66,112.28-91,225.76-38,889.60

Finding the Fourth Proportional to 66,112.28, 91,225.76 and 38,889.60

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Solution

The fourth proportional to 66,112.28, 91,225.76 and 38,889.60 is: 53,662.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,112.28 : 91,225.76 = 38,889.60 : x
  2. Step 2: Convert to fraction form
    66,112.28/91,225.76 = 38,889.60/x
  3. Step 3: Cross multiply
    66,112.28x = 91,225.76 × 38,889.60
  4. Step 4: Simplify right side
    66,112.28x = 3,547,733,316.10
  5. Step 5: Solve for x
    x = 3,547,733,316.10/66,112.28
  6. Step 6: Final answer
    x = 53,662.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.